Incandescent spirit-lamp.



No. 820,002. PATENTED MAY 8,1900.

W. LIEDKE 0 0. RABENHORST. INGANDBSGENT SPIRIT LAMP.

APPLICATION FILED MAY 20. 1905.

ANDREW a, cmmul co. vnoToqnmoemPNsns. wnsmnc on, u c

UNITED STATES PATENT OFFICE.

INGANDESCENT SPIRIT-LAMP.

Specification of Letters Patent.

Patented May 8, 1906.

Application filed May 20, 1905. Serial No. 261,367.

To all whom it may concern: I

Be it known that we, WILLIBALD LI'EDKE and Orro RABENHORST, subjects of the King of Prussia, German Emperor, residing at Oharlottenburg, Germany, have invented certain new and useful Improvements in or Relating to Incandescent Spirit-Lamps and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same. v

The present invention relates to incandescent spirit-lamps, and comprises a gasifier or vaporizer for the liquid fuel having a receptacle arranged at a higher level than the flame, the gasifier, however, still extending above said fuel-receptacle.

In all incandescent spirit-lamps in which the fuelreceptacle is above the levelof the burner and which are mostly constructed only for a high lighting power the disadvantage arises that all the fuel can flow out when the fuel-valve is opened before complete preliminary heating or when the preliminary heating-flame is extinguished from any cause before the ignition of the main flame has taken place.

The drawing shows a diagrammatic side view of the lamp.

In the incandescent spiritlamp constructed according to the present invention, which is shown diagrammatically in the annexed drawing, the flow of fuel from the receptacle through the gasifier is com letely prevented by the fact that the gas er 2; is extended above the fuel-level in the receptacle a. The level of the liquid fuel can therefore not rise higher in the gasifier than in the receptacle, and the liquid fuel cannot therefore pass through the nozzle d. However, this arrangement of the gasifier produces a considerable difliculty, consisting chiefly in the fact that on preliminary heating a very sudden gasification takes place. N o incandescent body can Withstand the gas then flowing out at high pressure. According to the present invention this inconvenience is removed by giving the gasifier '12 a comparatively large cross-section and by continuing it in the form of a tube f, the cross-section of which is considerably reduced, and by leading said gasiher-tube f again into a gas-conduit g, the cross section of which is again comparatively large. When the preliminary heating now takes place, this being mainly effected in the wider part 1) of the ga'sifier and in the gas-conduit, the small contents of the tube f is forced at the commencement of vapor formation into the already-heated tube g. The greater part of the fuel forced out of the tube f evaporates on the heated walls, whereas the remainder is forced out of the nozzle (1 under slight pressurethat is to say, without causing any disturbance.

In order that any liquid spirit which is forced through the tube f may be converted into gas before it reaches the burner, the upper part of the tube g, which projects over the mantle, is inclined, so that the liquid spirit runs down its lower side and cannot fall through the tube without coming in contact with it.

In the drawing referred to, h designates the fuel-valve, e the burner, and 7c the incandescent body or mantle.

H is a feed-pipe which connects the reservoir a with the main vaporizing-chamber v and which has the valve h at its lower part.

Having now particularly described and ascertained the nature of the said invention and in what manner the same is to be perfected, we declare that what we claim is In an incandescent spirit-lamp, the combination, with a burner, and a mantle; of a reservoir for spirit arranged above the said burner, a feed-pipe, an enlarged main vaporizing-chamber arranged at one side of the mantle and having its lower end connected with the said feed-pipe, an enlarged vaporconducting tube connected with the said burner and projecting above the level of the said reservoir, and a pipe of much smaller area than the said vaporizing-chamber and vaporconducting tube and connecting their upper ends.

In testimony whereof we aflix our signatures in presence of two witnesses.

WILLIBALD LIEDKE. OTTO RABENHORST.

Witnesses:

WOLDEMAR HAUPT, HENRY HAsPER. 

